[RFC patch 1/2] test: add known broken test for duplicate message id

[David Bremner]

There are many other problems that could be tested, but this one we
have some hope of fixing because it doesn't require UI changes, just
indexing changes.
---
 test/T670-duplicate-mid.sh | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100755 test/T670-duplicate-mid.sh

diff --git a/test/T670-duplicate-mid.sh b/test/T670-duplicate-mid.sh
new file mode 100755
index 00000000..d28afc91
--- /dev/null
+++ b/test/T670-duplicate-mid.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+test_description="duplicate message ids"
+. ./test-lib.sh || exit 1
+
+add_message [id]=id:duplicate '[subject]="message 1"'
+add_message [id]=id:duplicate '[subject]="message 2"'
+
+test_begin_subtest 'Search for second subject'
+test_subtest_known_broken
+cat <<EOF >EXPECTED
+MAIL_DIR/msg-001
+MAIL_DIR/msg-002
+EOF
+notmuch search --output=files subject:'"message 2"' | notmuch_dir_sanitize > OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
+test_done
-- 
2.11.0